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Consolidated Statement of Changes in Stockholders' Equity (Parenthetical)
 6 Months Ended
Jun. 30, 2017
$ / shares
shares
Preferred Stock (Par Value: $0.01):  
Issuance of preferred stock, shares 515,000
Common Stock (Par Value: $0.01):  
Shares issued for restricted stock awards, shares 1,992,823
Retained Earnings:  
Dividends paid on common stock, per share | $ / shares $ 0.34
Dividends paid on preferred stock, per share | $ / shares $ 15.94
Treasury Stock:  
Purchase of common stock, shares 686,207
Shares issued for restricted stock awards, shares 660,006